package proxy;

/**
 * Created by : Infaraway
 * DATE : 2017/3/3
 * Time : 15:12
 * Funtion : 计算器的功能
 */
public interface Calculator {

    int add(int a, int b);
    int sub(int a, int b);

    void mul(int a, int b);
    void div(int a, int b);
}
